namespace CSharpPro._1027;

public  abstract class UserTest
{
    public abstract void M1();
    public abstract void M2();
    public abstract void M3();
}

public class UserTestChild : UserTest
{
    public override void M1()
    {
        Console.WriteLine("子类实现的M1方法");
    }
    
    public override void M2()
    {
        Console.WriteLine("子类实现的M2方法");
    }
    
    public override void M3()
    {
        Console.WriteLine("子类实现的M3方法");
    }
}